Universe (Pit Stop)
From Jenny Everywhere Wiki
In one universe, trilobites survived into the modern day, with there being “beaches and jungles full of them”.
In a universe where they were extinct in the 21st century, teenage boy Eric, misunderstanding a school assignment to bring “a trilobite” to class, got Jenny Everywhere to take him to this universe, where they picked up a number of trilobites, wanting to give at least one to each of Eric's classmates. This understandably did not go well with the science teacher, one Mr Hernandez. (PROSE: Pit Stop)